inov-8 offer two width fittings. Precision: a narrower fit to lock in the forefoot and ensure minimal internal movement during shorter sessions. Standard: a wider fit in the toe box allowing the toes to splay for extra comfort during longer sessions. Many of our customers have told us they prefer to go up half a size in our standard fit. For the best results, we recommend you visit one of our retailers and get a full assessment.

STANDARD FIT

Our STANDARD fit offers a close-fitting heel that locks the shoe in position, while a wider toe box allows the toes to splay when running naturally or lifting weights. Standard fit suits those with wider feet and athletes using the product for long sessions.

PRECISION FIT

Our PRECISION fit offers a close-fitting heel that locks the shoe in position, while the forefoot is also close fitting. This all-round precise fit ensures minimal internal movement when running on all terrains. Precision fit suits those with a narrower forefoot and athletes using the product for short sessions.

Men's / Unisex Clothing

XXS

XS

S

M

L

XL

Chest

34" / 86cm

36" / 92cm

38" / 97cm

40" / 102cm

42" / 107cm

44" / 112cm

Waist

26" / 66cm

28" / 71cm

30" / 76cm

32" / 81cm

34"/86cm

36"/91cm

Women's Clothing

UK Size

EU Size

US Size

Chest

Waist

Hips

6

32

2

31 - 33"78 - 82cm

23 - 25"60 - 64cm

34 - 35"86 - 90cm

8

34

4

33 - 34"82 - 86cm

25 - 27"64 - 68cm

35 - 37"90 - 94cm

10

36

6

34 - 36"86 - 90cm

27 - 28"68 - 72cm

37 - 38"94 - 98cm

12

38

8

36 - 37"90 - 94cm

28 - 30"72 - 76cm

38 - 40"98 - 102cm

14

40

10

37 - 38"94 - 98cm

30 - 31"76 - 80cm

40 - 42"102 - 106cm

Handwear

Small

Medium

Large

X-Large

Glove

6 - 7"15 - 18cm

7 - 8"18 - 20cm

8 - 9"20 - 23cm

9 - 10"23 - 25cm

Mitt

5.5 - 7.5"14 - 19cm

6.5 - 8.5"17 - 22cm

7.5 - 9.5"20 - 25cm

-

Socks

Small

Medium

Large

UK 3-6

UK 7-9

UK 10-12

US 4-7

US 8-10

US 11-13

Extreme Thermo Socks

Sock size

UK shoe size

US M

EU

XS

3-5

4-6

36-38

S

5-7

6-8

38-40

M

7-9

8-10

40-43

L

9-11

10-12

43-46

XL

11-13

12-14

46-48

Calf Guards

Small

Medium

Large

12 - 14"30 - 35cm

14 - 16"35 - 40cm

16 - 18"40 - 45cm

Shoe Fit Scale

Fits Narrow

1

2

3

4

5

Fits Wide

We have graded the fit of all our shoes from 1 to 5 to make it easy for you to find the perfect fitting shoe. All our shoes are designed with Met-Cradle technology to lock down the mid-foot for a stable hold. Where they differ is in the toe box. Grade 1 represents our closest, most precise fit. At the other end of the scale, Grade 5 has the widest fitting toe box.

We have meticulously studied the foot and its function during the gait cycle and also the interaction between the foot and the terrain. We have used this knowledge to develop our fitting scale. For technical footwear a good fit is essential to enhance your performance.

The lower the number on our scale, the narrower the fit, which ensures minimal internal movement of the foot when running fast on technical terrain. Shoes with the higher numbers on our scale will suit athletes with a wider foot and those wanting that extra comfort in the toe box. This wider toe box allows the toes to splay for increased stability when lifting heavy weights. It’s also perfect for longer runs and races when toes begin to swell.

As a rough guide, Grade 1 represents an industry B fit, while Grade 5 equates to a 2E fit in the forefoot.